/*
*********************************************************************************************************
*                                             uC/GUI V3.98
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              �C/GUI is protected by international copyright laws. Knowledge of the
*              source code may not be used to write a similar product. This file may
*              only be used in accordance with a license and should not be redistributed
*              in any way. We appreciate your understanding and fairness.
*
----------------------------------------------------------------------
File        : EDITDec.c
Purpose     : Edit decimal values
---------------------------END-OF-HEADER------------------------------
*/

//#include <string.h>

#include "EDIT_Private.h"
#include "GUIDebug.h"

#if GUI_WINSUPPORT && EDIT_SUPPORT


/*********************************************************************
*
*        Defaults for config switches
*
**********************************************************************
*/
#ifndef EDIT_DEC_DIGITONLY
  #define EDIT_DEC_DIGITONLY     0
#endif


/*********************************************************************
*
*        static Helpers
*
**********************************************************************
*/
/*********************************************************************
*
*       _DecChar2Int
*/
static I32 _DecChar2Int(I32 Char)
{
	if ((Char >= '0') && (Char <= '9')){
		return Char - '0';
	}
	return -1;
}

/*********************************************************************
*
*       _UpdateBuffer
*/
static void _UpdateBuffer(EDIT_Handle hObj)
{
	char * s;
	EDIT_Obj * pObj;
	pObj = EDIT_H2P(hObj); /* The GUI needs not to be locked here. This function is called only from EDIT_AddKey which has already locked the GUI */
	s = (char*) GUI_ALLOC_h2p(pObj->hpText);
	if (pObj->Flags == GUI_EDIT_SIGNED) {
		I32 Result = GUI_AddSign(pObj->CurrentValue, &s);
		GUI_AddDecShift(Result, pObj->MaxLen - 1, pObj->NumDecs, &s);
	} else {
		GUI_AddDecShift(pObj->CurrentValue, pObj->MaxLen, pObj->NumDecs, &s);
	}
}

/*********************************************************************
*
*       _EditDec
*/
static void _EditDec(I32 Digit, EDIT_Obj* pObj, EDIT_Handle hObj)
{
	I32 Result = 0;
	I32 i, Pos = 0;
	char * s = (char*) GUI_ALLOC_h2p(pObj->hpText);
	for (i = 0; i < pObj->MaxLen; i++) {
		I32 Index = pObj->MaxLen - i - 1;
		if (Index == pObj->CursorPos) {
			Result += GUI_Pow10[Pos++] * Digit;
		} else {
			char c = *(s + Index);
			I32 Value = _DecChar2Int(c);
			if (Value >= 0) {
				Result += GUI_Pow10[Pos++] * Value;
			}
			if (c == '-') {
				Result *= -1;
			}
		}
	}
	EDIT_SetValue(hObj, Result);
}

/*********************************************************************
*
*       EDIT_DEC_DIGITONLY
*/
#if EDIT_DEC_DIGITONLY
static I32 GetCurrentDigit(EDIT_Obj* pObj) {
  return _DecChar2Int(EDIT__GetCurrentChar(pObj));
}
#endif

/*********************************************************************
*
*       _MakePositive
*/
static void _MakePositive(EDIT_Obj* pObj, EDIT_Handle hObj)
{
	if ((I32)pObj->CurrentValue < 0) {
		EDIT_SetValue(hObj, (I32)pObj->CurrentValue * -1);
	}
}

/*********************************************************************
*
*       _MakeNegative
*/
static void _MakeNegative(EDIT_Obj* pObj, EDIT_Handle hObj)
{
	if ((I32)pObj->CurrentValue > 0) {
		EDIT_SetValue(hObj, (I32)pObj->CurrentValue * -1);
	}
}

/*********************************************************************
*
*       _SwapSign
*/
static void _SwapSign(EDIT_Obj* pObj, EDIT_Handle hObj)
{
	if ((I32)pObj->CurrentValue > 0)
		_MakeNegative(pObj, hObj);
	else
		_MakePositive(pObj, hObj);
}

/*********************************************************************
*
*       _IncrementCursor
*/
static void _IncrementCursor(EDIT_Obj* pObj)
{
	EDIT__SetCursorPos(pObj, pObj->CursorPos + 1);
	if (EDIT__GetCurrentChar(pObj) == '.') {
		if (pObj->CursorPos < (pObj->MaxLen - 1)) {
			EDIT__SetCursorPos(pObj, pObj->CursorPos + 1);
		} else {
			EDIT__SetCursorPos(pObj, pObj->CursorPos - 1);
		}
	}
}

/*********************************************************************
*
*       _AddPosition
*/
#if !EDIT_DEC_DIGITONLY
static void _AddPosition(EDIT_Obj* pObj, EDIT_Handle hObj, I32 Sign)
{
	I32 Pos;
	I32 v;
	v = Sign;
	Pos = pObj->MaxLen - pObj->CursorPos-1;
	if (pObj->NumDecs && (Pos > pObj->NumDecs)) {
		Pos--;
	}
	while (Pos--) {
		v *= 10;
	}
	EDIT_SetValue(hObj, (I32)pObj->CurrentValue + v);
}
#endif

/*********************************************************************
*
*             Handle input
*
**********************************************************************
*/
/*********************************************************************
*
*       _AddKeyDec
*/
static void _AddKeyDec(EDIT_Handle hObj, I32 Key)
{
	char c;
	EDIT_Obj * pObj;
	pObj = EDIT_H2P(hObj); /* The GUI needs not to be locked here. This function is called only from EDIT_AddKey which has already locked the GUI */
	if (pObj) {
		switch (Key) {
			case '+':
				if (pObj->CursorPos == 0) {
					_MakePositive(pObj, hObj);
					_IncrementCursor(pObj);
				}
				break;
			case '-':
				if (pObj->CursorPos == 0) {
					_MakeNegative(pObj, hObj);
					_IncrementCursor(pObj);
				}
				break;
	#if EDIT_DEC_DIGITONLY
			case GUI_KEY_UP:
				c = EDIT__GetCurrentChar(pObj);
				if ((c == '-') || (c == '+')) {
					_SwapSign(pObj, hObj);
				} else {
					I32 Digit = GetCurrentDigit(pObj) + 1;
					if (Digit > 9)
						Digit = 0;
					_EditDec(Digit, pObj, hObj);
				}
				break;
			case GUI_KEY_DOWN:
				c = EDIT__GetCurrentChar(pObj);
				if ((c == '-') || (c == '+')) {
					_SwapSign(pObj, hObj);
				} else {
					I32 Digit = GetCurrentDigit(pObj) - 1;
					if (Digit < 0)
						Digit = 9;
					_EditDec(Digit, pObj, hObj);
				}
				break;
	#else
			case GUI_KEY_UP:
				c = EDIT__GetCurrentChar(pObj);
				if ((c == '-') || (c == '+')) {
					_SwapSign(pObj, hObj);
				} else {
					_AddPosition(pObj, hObj, 1);
				}
				break;
			case GUI_KEY_DOWN:
				c = EDIT__GetCurrentChar(pObj);
				if ((c == '-') || (c == '+')) {
					_SwapSign(pObj, hObj);
				} else {
					_AddPosition(pObj, hObj, -1);
				}
				break;
	#endif
			case GUI_KEY_RIGHT:
				_IncrementCursor(pObj);
				break;
			case GUI_KEY_LEFT:
				EDIT__SetCursorPos(pObj, pObj->CursorPos - 1);
				if (EDIT__GetCurrentChar(pObj) == '.') {
					if (pObj->CursorPos > 0) {
						EDIT__SetCursorPos(pObj, pObj->CursorPos - 1);
					} else {
						EDIT__SetCursorPos(pObj, pObj->CursorPos + 1);
					}
				}
				break;
			default:
			{
				char c = EDIT__GetCurrentChar(pObj);
				if ((c != '-') && (c != '+')) {
					I32 Digit = _DecChar2Int(Key);
					if (Digit >= 0) {
						_EditDec(Digit, pObj, hObj);
						_IncrementCursor(pObj);
					}
				}
			}
			break;
		}
	}
	_UpdateBuffer(hObj);
}

/*********************************************************************
*
*             Exported routines
*
**********************************************************************
*/
/*********************************************************************
*
*       EDIT_SetDecMode
*/
void EDIT_SetDecMode(EDIT_Handle hEdit, I32 Value, I32 Min, I32 Max, I32 Shift, U8 Flags)
{
	EDIT_Obj* pObj;
	if (hEdit) {
		pObj = EDIT_H2P(hEdit);
		pObj->pfAddKeyEx    = _AddKeyDec;
		pObj->pfUpdateBuffer= _UpdateBuffer;
		pObj->CurrentValue  = Value;
		pObj->CursorPos     = 0;
		pObj->Min           = Min;
		pObj->Max           = Max;
		pObj->NumDecs       = Shift;
		pObj->Flags         = Flags;
		pObj->EditMode      = GUI_EDIT_MODE_OVERWRITE;
		_UpdateBuffer(hEdit);
		if (EDIT__GetCurrentChar(pObj) == '.') {
			EDIT__SetCursorPos(pObj, pObj->CursorPos + 1);
		}
		WM_Invalidate(hEdit);
	}
}

#else  /* avoid empty object files */

void EditDec_C(void);
void EditDec_C(void){}

#endif /* GUI_WINSUPPORT */
	 	 			 		    	 				 	  			   	 	 	 	 	 	  	  	      	   		 	 	 		  		  	 		 	  	  			     			       	   	 			  		    	 	     	 				  	 					 	 			   	  	  			 				 		 	 	 			     			 
